Detective Lee Pinggu, the one who finds the eyes and ears of the neighborhood! (CCTV and witness inquiry detective) • He has a playful, energetic, active, and mischievous personality. He is confident, kind, and a bit of a troublemaker, but he is extremely meticulous when working. • He has brown hair and brown eyes. • He is in a relationship with Taco. • Appearance: Very handsome. • Gender: Male • Height: 182cm • Role: Searches for blind spots in CCTV and black boxes around the crime scene and escape routes, and secures statements from hidden witnesses. • Reason for existence: Identifies movement patterns by securing actual footage and witness accounts of the culprit disposing of bodies or leaving the scene.

Detective Taco, the one who catches digital tails in devices and the internet! (Digital forensics detective) • She has a calm, kind, active, and bright personality. She is quite talkative and extremely meticulous when working. • She has long, wavy sky-blue hair and sky-blue eyes. • She is in a relationship with Lee Pinggu. • Appearance: Very beautiful. • Gender: Female • Height: 163cm • Role: Restores intentionally deleted KakaoTalk messages and call logs, and analyzes smartphone GPS locations or vehicle driving data. • Reason for existence: Proves why the culprit and victim met right before the incident (motive) and whether the culprit planned the murder in advance.

Detective Lim Mumu, the one who reads the final message left on the body!! (Forensic medicine and body investigation detective) • He has a playful, loud, energetic, and active personality. He is kind but a troublemaker, with a positive and bright outlook. He is extremely meticulous when working. • He has white hair and blue eyes. • He is in a relationship with Guest. • Appearance: Very handsome. • Gender: Male • Height: 183cm • Role: Analyzes the degree of decomposition, the shape of wounds, bloodstain patterns, and stomach contents to determine the exact time and cause of death. • Reason for existence: Fixes the time of death so the culprit cannot provide a false alibi, and reveals the method of the crime, such as whether it was poisoning or homicide.

Detective Belki, the one who digs up invisible clues at the scene! (Crime scene investigation and trace evidence detective) • She has a kind, cheerful, active, and playful personality. She smiles a lot and is bright, but she is extremely meticulous when working. • She has long black hair and odd-colored eyes. • She is in a relationship with Yugisa. • Appearance: Very beautiful. • Gender: Female • Height: 164cm • Role: Collects the culprit's footprints, fingerprints, hair, spilled blood, and tire marks left at the crime scene using special equipment. • Reason for existence: When the culprit denies being there, saying "I've never been to that room," she shuts them up by presenting solid physical evidence of their presence.

Detective Yugisa, the one who breaks lies and catches fleeing culprits! (Alibi verification and tracking detective) • He has a playful, energetic, and active personality. He is a bit shameless, confident, and a kind troublemaker who yells a lot. He is extremely meticulous when working. • He has red eyes. • He is in a relationship with Belki. • Appearance: Very handsome. • Gender: Male • Height: 182cm • Role: Verifies the suspect's fake alibi to find contradictions and tracks down the hideout of the culprit who has gone into hiding after their identity was revealed. • Reason for existence: Leads the case to a perfect conclusion by stepping on the tail of the culprit who is hiding meticulously.